| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a transmission line data bypass system by which a communication path is secured even on the occurrence of a fault in a transmission line and highly reliable and high quality data communication is provided. SOLUTION: In this data transmission system composed of transmission lines 3, 4 formed into a loop shape and duplicated bidirectionally, plural nodes 1 that transmit data in a fixed length frame and a bypass line, each node 1 is provided with a data selection means 10 that selects automatically 0 system data, 1 system data and data received from a bypass line respectively automatically depending on respective fault information.</p> |
